We look at the division of 863511 by 23 
The aim is to understand the frequency of 23 in 863511.

Step 1:
If we divide 8 by 23, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 23

On to step 2:
If we divide 86 by 23, we get 3 and a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 17 after subtracting 69 from 86.
Fetch the next digit (3) from the dividend, attach it to 17 and continue: 173 / 23

Step 3:
173 divided by 23 is 7 with a remainder of 12.
Use 7 as the next digit of our solution. 
Result so far: 37.0
If we take 161 away from 173, we end up with 12.
Fetch the next digit (5) from the dividend, attach it to 12 and continue: 125 / 23

Advancing to step 4:
125 divided by 23 is 5 with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 375.0
Subtracting 115 from 125 leaves us with 10.
Bring next digit (1) of the dividend behind the 10 and repeat the process: 101 / 23

Advancing to step 5:
The number 23 fits into 101 4 times, leaving a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 3754.0
Subtract 92 from 101 to get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 23

Let's proceed to step 6:
When dividing 91 by 23, we get 3 with a remainder of 22.
Put 3 as the next digit of the answer. 
Result so far: 37543.0
If we subtract 69 from 91, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 7:
23 can be fit into 220 9 times, resulting in a remainder of 13.
Record the quotient 9 as the next digit in the result. 
Result so far: 37543.9
Subtract 207 from 220 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 8:
130 divided by 23 is 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 37543.95
If we take 115 away from 130, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 9:
If we divide 150 by 23, we get 6 and a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 37543.956
Subtract 138 from 150 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 10:
If we divide 120 by 23, we get 5 and a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 37543.9565
If we subtract 115 from 120, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 11:
When dividing 50 by 23, we get 2 with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 37543.95652
The remainder is 4 after subtracting 46 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 12:
23 goes into 40 1 times with a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 37543.956521
If we take 23 away from 40, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 13:
170 divided by 23 is 7 with a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 37543.9565217
Subtract 161 from 170 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 14:
The number 23 fits into 90 3 times, leaving a remainder of 21.
The number 3 becomes the next digit in our result. 
Result so far: 37543.95652173
If we take 69 away from 90, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Our division results in 37543.95652173 with a remaining 2.1e-08.